Yes that article seems to be describing the same signature. But it looks
like you don’t want to try to use that snippet of DOS code. I would use
IOCTL_DISK_GET_PARTITION_INFO to get the starting offset and length of the
volume you’re concerned with; then IOCTL_DISK_GET_DRIVE_LAYOUT to get the
signature of the disk itself.
The signature, plus partition offset and partition length should uniquely
identify the partition. Note you shouldn’t use the partition number
because this is just the relative position of the partition on disk, and
repartitioning the disk can create a new, different partition with the
same number.
Dave Cox
Hewlett-Packard Co.
HPSO/SSMO (Santa Barbara)
https://ecardfile.com/id/Dave+Cox
-----Original Message-----
From: xxxxx@erinet.com [mailto:xxxxx@erinet.com]
Sent: Friday, March 17, 2000 11:42 AM
To: File Systems Developers
Subject: [ntfsd] RE: Can drive device name get changed between reboot ?
Thanks for the information ! Now I am planning to use Volume Serial number
as described in Q69223 that maybe is what you described as partition
signature or should achieve the same affect I want.
Anyway, if the above does not work, please let me know !
Jack Cheng
(Curriculum Corp.)
On Fri, 17 Mar 2000, COX,DAVID (HP-Roseville,ex1) wrote:
It can change. Consider the case of storage area networks, in which
there can be many disks on the network, not all of which are intended
for use by any one computer. SAN storage allocation managers may
assign and unassign disks to your computer, which can result in one
disk appearing in a different HarddiskN directory at different times,
without any physical recabling.Similarly, cabling changes outside of your computer can cause the
same set of disks to be discovered in a different order, causing changes
in the harddisk number.Why not use the partition signature as the unique identifier?
Dave Cox
Hewlett-Packard Co.
HPSO/SSMO (Santa Barbara)
https://ecardfile.com/id/Dave+Cox-----Original Message-----
From: xxxxx@curriculum.com [mailto:xxxxx@curriculum.com]
Sent: Monday, March 13, 2000 4:21 AM
To: File Systems Developers
Subject: [ntfsd] Can drive device name get changed between reboot ?Hi all,
I plan to use device name like /Device/Harddisk0/Partition1 to uniquely
identify files on that drive.Without reformating or switching cables, can that device name get changed?
I don’t think it can, however someone told me otherwise.
Thanks,
Jack Cheng
You are currently subscribed to ntfsd as: david_cox2@hp.com
To unsubscribe send a blank email to $subst(‘Email.Unsub’)
You are currently subscribed to ntfsd as: xxxxx@erinet.com
To unsubscribe send a blank email to $subst(‘Email.Unsub’)
You are currently subscribed to ntfsd as: david_cox2@hp.com
To unsubscribe send a blank email to $subst(‘Email.Unsub’)